1. Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, Taegu, Republic of Korea;
2. Department of Diagnostic Radiology, College of Medicine, Yeungnam University, Taegu, Republic of Korea;
3. Department of Neurosurgery, College of Medicine, Yeungnam University, Taegu, Republic of Korea;
4. Department of Physical Therapy, College of Health Sciences, Dankook University, Cheonan, Republic of Korea